<template>
    <div class="sidebar">
        <el-menu :default-active="onRoutes" class="el-menu-vertical-demo" theme="dark" unique-opened router>
            <template v-for="item in items">
                <template v-if="item.subs">
                    <el-submenu :index="item.index">
                        <template slot="title"><i :class="item.icon"></i>{{ item.title }}</template>
                        <el-menu-item v-for="(subItem,i) in item.subs" :key="i" :index="subItem.index">{{ subItem.title }}
                        </el-menu-item>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.index">
                        <i :class="item.icon"></i>{{ item.title }}
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
  export default {
    data() {
      return {
        items: [
          {
            icon: 'el-icon-setting',
            index: 'home',
            title: '首页'
          },
          {
            icon: 'el-icon-menu',
            index: '2',
            title: '交易记录',
            subs: [
              {
                index: 'traderecord',
                title: '交易记录'
              }
            ]
          },
          {
            icon: 'el-icon-date',
            index: '3',
            title: '商品管理',
            subs: [
              {
                index: 'goodsinfo',
                title: '商品信息'
              }
            ]
          },
          {
            icon: 'el-icon-star-on',
            index: 'ad',
            title: '轮播管理'
          }
        ]
      }
    },
    computed:{
        onRoutes(){
            return this.$route.path.replace('/','');
        }
    }
  }
</script>

<style scoped>
    .sidebar{
        display: block;
        position: absolute;
        width: 250px;
        left: 0;
        top: 70px;
        bottom:0;
        background: #2E363F;
    }
    .sidebar > ul {
        height:100%;
    }
</style>
